Figure 2 .--Limbs were severed 

 by the climber and allowed 

 to free-fall except for loj'ge 

 sample branches that were 

 lowered by rope to prevent 

 breakage. Tops were rigged 

 with a safety rope to help 

 control and direct the fall. 



Trees were sampled from April to October during three successive field seasons. 

 New growth was included in all weight and moisture measurements. Once foliage and 

 branchwood of the current year's growth could be separated, they were thoroughly mixed 

 with old foliage and branchwood before moisture samples were taken. Thus, moisture 

 contents were averages of old and new growth. 



Most trees were sampled after new foliage had been produced. Variation in foliage 

 biomass due to sampling before and after growth of new foliage should be inconsequential 

 except perhaps for ponderosa pine. For this species, which retains only 3 to 4 years' 

 growth of foliage, trees with and without new foliage were sampled. Thus, this varia- 

 tion in foliage biomass was incorporated into the data. 



Other measurements included: 

 --D.b.h. (outside bark); 



--diameter outside bark at the base of live crown; 

 --total tree height (includes stump); 



--length of bole tips to 1-, 2-, 3-, 4-, and 6-inch bole diameters; 



--live crown length (base of the live crown was identified as the position on 



the bole where a full croivn could exist if lower branches were moved up to 



fill in open spaces); 

 --length of the lower one or two live crown sections; 



--crown widths (average of two perpendicular measurements taken at the bottom 



of each crown section) ; 

 --length of needle-free cavity (measured from the base of live crown to a point 



along the bole where live foliage was encountered); 

 --width of needle-free cavity (average of two perpendicular measurements taken 



at the base of the live crown); 



5 



